Improved control method of HVAC system for Demand Response

Demand side management (DSM) is a technical program that have the purpose of smoothing the load curve by reducing its peaks and filling its valleys, and of ancillary services and frequency regulation. Many demand response programs (DRP) are used for this purpose. The thermostatically controlled load (TCL) are the most efficient programs used for DSM and especially for ancillary services. In this work, we study the heating ventilation air conditioning (HVAC) system as one of appliances that fall under the category of TCL. In literature, the chiller power variation due to direct control of HVAC supply fan speed is not considered for DSM. This paper fills this gap and increases the participation capacity of HVAC. Therefore, the HVAC system is remodeled in order to express with more accuracy the chiller power variation. The new model relates the chilled water temperature to the leaving air temperature. Simulation results shows the improvement provided by this method.